Slip-form jack



April 16, 1963 Filed June 8, 1959 A. GATTNAR ETAL SLIP-FORM JACK 5Sheets-Sheet 1 April 16, 1963 A. GATTNAR ETAL 3,035,787

SLIP-FORM JACK Filed June 8, 1959 5 Sheets-Sheet 2 April 16, 1963 A.GATTNAR ETAL 3,085,787

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April 16, 1963 A. GATTNAR ETAL SLIP-FORM JACK 5 Sheets-Sheet 4 FiledJune 8, 1959 A ril 16, 1963 Filed J 1959 A. GATTNAR SLIP-FORM JACK 5Sheets-Sheet 5 United States Patent 3,085,787 SLIP=FORNI JACK AntonGattnar, Munich, Erwin Schwausch, Lohhof, near Munich, and GottfriedBodmeier and Anton Zeitler, Munich, Germany, assignors to Siemens-Bauunon G.rn.b.H., Berlin and Munich, Germany, a corporation of Germany FiledJune 8, 1959, Ser. No. 818,835 Ciairns priority, application GermanyJune 13, 1958 2 Claims. (Cl. 254-106) This invention is concerned withadjustable scaffolding for concrete constructions, a so-calledsliding-panel scaffolding, which is particularly advantageously used inerecting concrete constructions having high and smooth walls, suchscaffolding having forming panels between which the concrete is to bepoured, and such forming panels, together with associated work stages orplatforms being according to the progress of a construction upwardlydisplaceable along principal upright carriers which are anchored in orupon previously completed sections of the concrete wall to beconstructed.

The arrangement of the upright carriers within the concrete wall to bebuilt presents certain advantages so far as the construction of thesliding forming panels is concerned, but renders difiicult the recoveryof the carriers which lie in the concrete. The carriers which are placedin successively higher positions as the concreting progresses, may be inknown manner provided with bushing-like sleeves which are raised alongthe carriers together with the forming panels and prevent the embeddingof the carriers. The number of carriers, consisting of round or oftubular steel members, to be kept available at a construction site, mustbe sufficient for the entire height of the structure to be built.Considerable amounts of steel are required since the walls must beprovided with the vertically extending principal carriers at spacingsfrom two to three meters, and full recovery of the carriers isaccordingly of great economic Value. Experience teaches that aconsiderable percentage of the carriers extending within the concretewall to the ground cannot be removed after completion of the wall, owingto excessive frictional resistance and the like, so that they must beabandoned as lost.

The invention shows a way pointing to relatively effortless recovery,with more chances of success, of the carriers which are verticallyupwardly placed within cylindrical cavities of the concrete wall.

In accordance with the invention, this object is realized, by raising orhoisting the carriers in sections, in the course of the progress of thework, and placing them upon supports, for example, steel plates, whichare from the outside insertible through openings formed in the concretewall to be built and extend into the areas of the cavities provided forthe carriers.

The above indicated procedure reduces the number of upright carriers tobe kept available, requiring carriers for only a fraction of the finalheight of the construction, and moreover calling for removal of carriersfrom only the final ten to fifteen meters of the topmost wall portion,such removal being relatively easily accomplished, so that as a rule allcarriers can be recovered.

It is recommended to employ tubular carriers with a diametercorresponding to the required breaking stress. Such tubular carriers areof importance particularly in connection with mechanical raising orhoisting devices in which the entire slide panel assembly is suspendedfrom clamping rings, the inner diameter of which exceeds that of thecarriers, and which are eccentrically loaded so that they wedge inclamping engagement with the carriers.

Further details of the invention will appear from the "ice descriptionof an embodiment which will be rendered below with reference to theaccompanying drawings. In the drawings,

FIG. 1 is a front view of the essential parts of the slide panelscaffolding extending over the range of four carrier or hoisting lines;

FIG. 2 is a side view of a plurality of telescoping hoisting devices andhydraulic system therefor, with portions of the respective structuresillustrated in section;

FIG. 3 shows a side view of the structure;

FIG. 4 illustrates a two-part guide or positioning block to be insertedinto the wall for the support of an upright carrier;

FIG. 5 represents a section through the upper part of the concrete Wallwith a guide block inserted therein;

FIG. 6 shows a front view of a guide block with the lower end of anupright carrier supported upon a plate inserted in the guide block;

FIG. 7 is a part sectional side view of the raising or hoisting andclamping device associated with an upright carrier; and

FIG. 8 shows a top view of the structure according to FIG. 7.

Referring now to FIGS. 1 and 3, B is the concrete wall to be built,having guide or positioning blocks ST inserted therein. The uprightcarriers K are pipes with relatively small diameter, extending throughcylindrical cavities of the concrete wall, and respectively supportedeach by a plate p disposed in the corresponding positioning block ST(FIG. 6), the carriers projecting more or less beyond the upper end ofthe wall. As seen from FIG. 3, the lower work platforms B1 and B2, withthe forming panels Ta1 and TaZ, and the upper work platform B3, which isconnected therewith through the medium of a schematically indicatedtwin-head structure G, are suspended from the upright carriers K bymeans of the schematically indicated suspension or hoisting device A.

The suspension or hoisting device A, as will be presently explained withreference to FIGS. 7 and 8, is provided with a plurality of clampingrings surrounding the corresponding upright carrier, and embracing thecarrier incident to the lifting or hoisting operation, the uppermostclamping ring clamping first about the carrier and, by means of ahydraulically controlled telescope-bar drive, causing displacement ofthe lower clamping ring from which depends the slide-panel structure;the lower clamping ring thereupon clamping fast about the carrierwhereupon the telescope-bar drive is operated in spreading sense,thereby moving the upper clamping ring upwardly, such ring againclamping about the carrier, thus effecting the raising of theslide-panel assembly. The hydraulically controlled hoisting devices,which are required for the respective upright carriers, aresimultaneously switched in over the entire extent of the wall, thusoperating mutually inparallel and thereby raising the slide-panelassembly, for example, always by five to eight centimeters. The concreteis thereupon poured, and further upward sliding is effected only afterthe upper end of the poured concrete has sufiiciently set (hardened).The previously mentioned sleeves, such as the sleeve H "(FIG 3), arerespectively fastened to the lower transanswer in the concrete wall,spaced from one another by the length of one or more upright carriers(always from six to eight meters long).

The guide or positioning block consists of two similarly shapedcomplementary halves, forming a unit having at the top and at the bottomcylindrical openings approximated to the diameter of the protectingsleeve and being opened toward the front (FIG. 6) or wall side. *Intothis block is subsequently inserted an iron plate 7 to serve as asupport for an upright carrier K, as indicated in FIG. 6.

Entry of concrete into the interior of the guide block must be preventedduring the concreting; as shown in FIG. 5, the rectangular opening inthe guide block is for this purpose closed by a small board b.

While the carrier as well as the tubular protecting sleeve surroundingit pass upon raising through the guide block ST, the sleeve moves duringfurther raising out of the block ST. The slide panel assembly reachesupon further raising the position in which it is shown in FIG. 3. Theclamping action of the clamping device A is during a pause in theraising operation temporarily disabled, thus relieving the respectivecarriers for upward motion thereof by operations conducted from the workplatform B3; the respective upper carriers are thereupon removed whilethe lower carriers K are left in the concrete wall to stand respectivelyupon plates p which are inserted into the corresponding guide blocks.

In FIG. 3 is indicated downwardly extending suspension parts havingauxiliary work platforms B4 and B5 which are suitably fastened to thehead structure G, such platforms serving as stages for the insertion ofthe guide blocks ST. The channels or cavities extending in the concretewall downwardly, from which the uprights had been removed, can therebybe filled with concrete; the lateral openings of the respective guideblocks (shown in FIG. 5 as closed by means of a board) can also beclosed by operations from the auxiliary platforms B4 or B5 either byinserting mortar or by the use of suitable closure members. Thesupporting plates (p in FIG. 6) can moreover be removed after upwarddisplacement of the corresponding uprights, and such plates can be usedagain for insertion into the successively higher guide blocks.

The upward drawing of the individual carrier sections is eifected duringthe pauses in which there is no sliding displacement of the formingpanels, relieving the corresponding raising position temporarily of theload, the weight of the resting forming panel assembly, including workload, being temporarily absorbed by friction of the forming panels aswell as by incompleted neighboring upright carrier lines. Accordingly,the upright carriers of all positions are not drawn upwardlysimultaneously or directly successively, but in the course of the workonly in connection with a certain number of carrier lines, always duringthe pauses between sliding displacement of the forming panels, so thatthe labor force required therefor can be continuously occupied while thesliding and panel-positioning operations do not suffer any delays.

As may be recognized from the schematic representation in FIG. 3, thesuspension device A comprises two clamping heads which embrace theupright carrier tube or pipe K. These clamping heads are interconnectedby means of a telescope-rod drive operated by a pressure medium, forexample, water under pressure. The upper part A1 of the suspensiondevice (A in FIG. 3) and cooperating telescope-rods is illustrated inFIG. 7, the lower part A2, shown in FIG. 2, being constructed similarly.

The part A1 consists essentially of a cylindrical bushing provided withcovers a l and d2 connected thereto by screws, the carrier pipe Kpassing therethrough with slight play. From the bushing A1 extendcarrier arms having upper fastening eyelets a1-[12 and lower fasteningeyelets a3a4, respectively. The lower fastening eye lets 413-114 areengaged by forked ends t1-t2 of the telescope-rods T1 and T2, bolts b1and b2 extending through holes in the forked ends 113 and a4 and throughthe eyelets, respectively, such bolts being suitably secured againstinadvertent or accidental disengagement. Each telescope-rod consists inknown manner of two mutually telescoping parts operating in the mannerof a cylinder T13 or T23 and a cooperating piston T12 or T22, one of theparts, for example the pistons T12 and T22 being in the illustratedmanner connected with the respective eyelets a3 and a4 of the upperclamping head A1 and the other parts, for example the cylinders T13 andT23, of the telescope-rods T1 and T2 being connected with eyelets of thelower clamping heads A2, illustrated in FIG. 2, corresponding to theupper eyelets a1a2 of the upper clamping head shown in FIG. 7. To thelower eyelets such as (13, mi, of each lower clamping head is insuitable manner connected the transverse bar g shown in FIG. 3; thelower eyelets of the lower clamping head thus carrying the entire slidepanel assembly. The hydraulic liquid, for example, water under pressure,is conducted to the upper (and lower) ends of the telescoperod drivethrough hose means connected with openings such as 01 and 02.

In the upper bushing A1 (and similarly also in the corresponding lowerbushing) are disposed three clamping rings r1, r2, r3, which arerespectively pressed upwardly by cooperating conical springs 11, f2, f3.The rings r1 to )8 lie respectively in engagement with the inner ends ofstub screws c1, c2, c3, and, as shown in connection with the ring r1,can be pressed downwardly against the force of the corresponding springsf1, f2, f3, by means of associated bolts or pegs e1, e2, e3 adapted tobe displaced radially by means of sleeve nuts 111, 112, L43 respectivelycooperating therewith. The ends of bolts or pegs e1, e2, e3 are for thispurpose formed oblique so that the rims of the associated rings r1, r2,r3 can downwardly slide thereon. In case all three bolts e1, e2, e3 aremoved radially inwardly into the position in which bolt 21 isillustrated, all three rings r1, r2, r3 will be disengaged or decoupledfrom the upright carrier K, so that the bushing A1 can move in bothdirections freely with respect to the carrier. However, the clampingrings are normally in the positions illustrated in connection with ringsr2 and r3.

After the concrete has been poured up to the upper rim of the formingpanels (FIG. 1) such panels or boards Tal and Ta2 are together with theentire forming assembly pulled a few feet higher. Water under pressureis for this purpose pumped from a centrally located pump P, actuated bysuitable means such as a motor M, as illustrated in FIG. 2, and oversuitable lines p0 into the openings 01 and 02 (FIG. 7) of thetelescope-rod drives of all suspension devices A of FIG. 1. Thetelescoperod drives are thereby shortened, whereby the bushing A1 (FIG.7) attaches itself with its two clamping rings r2 and r3 to the uprightcarrier K, thus causing the rods T1 and T2 to raise the lower clampinghead A2 together with the forming panel assembly fastened thereto, by anamount corresponding to the stroke of the telescope-rod drive. In orderto avoid undesired strokes of different length, due to different loadingof the individual raising devices, which would bring the scaffoldinginto an oblique position, it is necessary that the individualtelescope-rod drives be supplied with pressure liquid, until eachengages an associated stop at the instant when the entire stroke hasbeen completed. However, in order to permit raising of the formingpanels by different amounts, at the supporting points therefor, so as tocorrect errors with respect to the horizontal position thereof, thereare provided at the rod drivesTl and T2, adjusting nuts m1 and m2,whereby the stroke of each hoisting device can be adjusted independentlyof the others since the stroke length or height of the respective rodsis changed thereby. The nuts m1 and 2222 can be actuated by utilizing athread cut on the telescoping rods of the rod drives T1 and T2 so thatthe telescope rods, While always returning tully can be operativelyactuated only to the stop of the respective adjusting nuts m1 and m2. Itis understood, of course, that both adjusting nuts must be uniformlyset. Upon subsequent cessation of the hydraulic pressure in the hoistingdevices, the telescope-rod drives will cease to hold the slide-panelassemblies in equilibrium the clamping rings of the lower bushing A2, asshown in FIG. 2 taking the load, while the clamping rings of the upperbushing A1 (FIG. 7) are relieved of the load.

The telescope-rods can thereafter be extended again .over the entirelength of the stroke, either by strong springs or by hydraulic pressureat the other end of the pistons thereof under control of the two-wayvalve Z, thereby effecting raising of the upper carrier elements, thatis, the bushings such as A1 with the corresponding clamping rings r1 tor3 which do not hinder the upward motion of the corresponding bushingsA1.

The successively effected operations, namely, the clamping fast of theclamping rings r1 to r3 of the upper bushing Al; the raising of theslide-panel assembly on this bushing A1 owing to shortening orcontraction of the telescope-rod drives T1 and T2 responsive to inwarddisplacement of the drives; the subsequent clamping of the clampingrings in the lower bushing, which take over the entire load; and finallythe re-extension of the telescope-rod drives T1 and T2 and therewithraising of the bushing A1, effect stepwise raising of the entireslide-panel assembly along the principal upright carriers.

Changes may be made within the scope and spirit of the appended claimswhich define what is believed to be new and desired to have protected byLetters Patent.

We claim:

1. Motor driven hoisting apparatus for use in constructing a concretewall and the like, progressively upwardly in generally verticallyextending sections, said hoisting apparatus being cooperativelyassociated with a vertically extending carrier rod adapted to beanchored in and extending upwardly from a completed wall section, forraising scaffolding along such carrier rod to a level from which thenext wall section is to be constructed, said hoisting apparatuscomprising two vertically spaced apart rod-gripping devices each havinga tubular generallv cylindrical casing concentrically surrounding saidcarrier rod with play and forming a radial space therewith, at least twovertically extending fluid pressure controlled raising devicessymmetrically disposed with respect to and radially spaced from saidcarrier rod, each raising device having a telescoping drive comprising acylinder and a piston movably disposed therein, means for articulatelylinking the pistons of said raising devices with the casing of one ofsaid rod-gripping devices and means for articulately linking thecylinders of said raising devices with the casing of the other one ofsaid rod-gripping devices, means for alternately selectively conveyingpressure fluid respectively to the top and bottom of the cylinders ofthe respective raisin-g devices to efiect the raising operation thereof,and means in the respective rod-gripping devices operatively responsiveto the raising operation of said raising devices for causing the casingof the upper rodgripping device to anchor itself to the carrier rodwhile the lower rod-gripping device slides upwardly therealong to ahigher level, said last named means comprising a. plurality of clampingrings disposed within the radial space formed by the casing of eachrod-gripping device with said carrier rod, means projecting radiallyinwardly (from the wall of the respective casing for holding saidclamping rings on one side thereof, and spring means acting respectivelyagainst said clamping rings on the other side thereof for holding saidclamping rings normally in an angular position which determines thedirection in which the respective rod-gripping device is to berespectively anchored to the carrier rod or is to be slidable withrespect thereto.

2. Hoisting apparatus according to claim 1, comprising radiallyadjustable bolt means projecting through the wall of the respectivecasings of said rod-gripping devices inwardly thereof and havinglangularly shaped inner ends, for placing said clamping rings intopositions extending in a plane perpendicularly to the axis of thecarrier rod and thereby disengaging said clamping rings from saidcarrier rod.

References Cited in the file of this patent UNITED STATES PATENTS103,899 Lewis June 7, 1870 804,510 Vaughan Nov. 14, 1905 1,044,659Jacobson Nov. 19, 1912 1,213,838 Conklin Jan. 30, 1917 1,887,835Durchholz Nov. 15, 1932 1,935,377 Roemer Nov. 14, 1933 2,620,543Scharsach Dec. 9, 1952 2,673,065 Patterson Mar. 23, 1954 2,673,067Fredrickson Mar. 23, 1954 2,723,437 Ghorrnley et a1. Nov. 15, 19552,756,019 Von Heidenstam et a1. July 24, 1956 2,914,302 Sampson et al.Nov. 24, 1959 2,934,804 Suderow May 3, 1960 FOREIGN PATENTS 336,853Great Bnitain Oct. 23, 1930 371,385 Italy May 22, 1939 558,255 GreatBritain Dec. 29, 1943 1,014,974 France June 25, 1952

1. MOTOR DRIVEN HOISTING APPARATUS FOR USE IN CONSTRUCTING A CONCRETEWALL AND THE LIKE, PROGRESSIVELY UPWARDLY IN GENERALLY VERTICALLYEXTENDING SECTIONS, SAID HOISTING APPARATUS BEING COOPERATIVELYASSOCIATED WITH A VERTICALLY EXTENDING CARRIER ROD ADAPTED TO BEANCHORED IN AND EXTENDING UPWARDLY FROM A COMPLETED WALL SECTION, FORRAISING SCAFFOLDING ALONG SUCH CARRIER ROD TO A LEVEL FROM WHICH THENEXT WALL SECTION IS TO BE CONSTRUCTED, SAID HOISTING APPARATUSCOMPRISING TWO VERTICALLY SPACED APART ROD-GRIPPING DEVICES EACH HAVINGA TUBULAR GENERALLY CYLINDRICAL CASING CONCENTRICALLY SURROUNDING SAIDCARRIER ROD WITH PLAY AND FORMING A RADIAL SPACE THEREWITH, AT LEAST TWOVERTICALLY EXTENDING FLUID PRESSURE CONTROLLED RAISING DEVICESSYMMETRICALLY DISPOSED WITH RESPECT TO AND RADIALLY SPACED FROM SAIDCARRIER ROD, EACH RAISING DEVICE HAVING A TELESCOPING DRIVE COMPRISING ACYLINDER AND A PISTON MOVABLY DISPOSED THEREIN, MEANS FOR ARTICULATELYLINKING THE PISTONS OF SAID RAISING DEVICES WITH THE CASING OF ONE OFSAID ROD-GRIPPING DEVICES AND MEANS FOR ARTICULATELY LINKING THECYLINDERS OF SAID RAISING DEVICES WITH THE CASING OF THE OTHER ONE OFSAID ROD-GRIPPING DEVICES, MEANS FOR ALTERNATELY SELECTIVELY CONVEYINGPRESSURE FLUID RESPECTIVELY TO THE TOP AND BOTTOM OF THE CYLINDERS OFTHE RESPECTIVE RAISING DEVICES TO EFFECT THE RAISING OPERATION THEREOF,AND MEANS IN THE RESPECTIVE ROD-GRIPPING DEVICES OPERATIVELY RESPONSIVETO THE RAISING OPERATION OF SAID RAISING DEVICES FOR CAUSING THE CASINGOF THE UPPER RODGRIPPING DEVICE TO ANCHOR ITSELF TO THE CARRIER RODWHILE THE LOWER ROD-GRIPPING DEVICE SLIDES UPWARDLY THEREALONG TO AHIGHER LEVEL, SAID LAST NAMED MEANS COMPRISING A PLURALITY OF CLAMPINGRINGS DISPOSED WITHIN THE RADIAL SPACE FORMED BY THE CASING OF EACHROD-GRIPPING DEVICE WITH SAID CARRIER ROD, MEANS PROJECTING RADIALLYINWARDLY FROM THE WALL OF THE RESPECTIVE CASING FOR HOLDING SAIDCLAMPING RINGS ON ONE SIDE THEREOF, AND SPRING MEANS ACTING RESPECTIVELYAGAINST SAID CLAMPING RINGS ON THE OTHER SIDE THEREOF FOR HOLDING SAIDCLAMPING RINGS NORMALLY IN AN ANGULAR POSITION WHICH DETERMINES THEDIRECTION IN WHICH THE RESPECTIVE ROD-GRIPPING DEVICE IS TO BERESPECTIVELY ANCHORED TO THE CARRIER ROD OR IS TO BE SLIDABLE WITHRESPECT THERETO.